For acute angle `theta`, Prove that `sinthetaltthetalttantheta`.

Explanation

To prove that for acute angle \( \theta \), \( \sin \theta < \theta < \tan \theta \), we can use a geometric approach involving the unit circle.

### Step-by-Step Solution:

1. **Consider the Unit Circle**:
- Draw a unit circle centered at the origin \( O(0, 0) \) with radius 1.
- Let point \( A \) be at \( (1, 0) \) on the circle, and point \( B \) be at \( (\cos \theta, \sin \theta) \) where \( \theta \) is the angle formed with the positive x-axis.

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